21360423

素因数分解:

$3^1\times 7^2\times {\mathrm{331}}^1\times {\mathrm{439}}^1$

素因数の和:787

約数の個数: 24

約数和(自身を含む): 33306240

約数和(自身を除く): 11945817

約数列:

[1, 3, 7, 21, 49, 147, 331, 439, 993, 1317, 2317, 3073, 6951, 9219, 16219, 21511, 48657, 64533, 145309, 435927, 1017163, 3051489, 7120141, 21360423]

約数ペア:

[(1, 21360423), (3, 7120141), (7, 3051489), (21, 1017163), (49, 435927), (147, 145309), (331, 64533), (439, 48657), (993, 21511), (1317, 16219), (2317, 9219), (3073, 6951)]